Engine and like governor



D. COCKBURN AND D. MAcNICOLL.

ENGINE AND LIKE GOVERNOR. APPLICATION FILED APR. 15. I919.

Patented Feb. 17,1920.

3 %HEEJ'SSHEET 1- INK/{Tana D. Co c/fbarn. I 2- Mac A/I'COZZ.

D. COCKBURN AND D MACNIGOLL.

ENGINE AND LIKE GOVERNOR. APPLICATION FILED APR. 15. I919.

1, 33 1 ,4 l 6. Patented Feb. 17, I920.

3 SHEETSSHEET 2.

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D. COCKBURN AND ACNIC LL,

ENGINE AND LIKE GOVERNOR.

APPHCATION FILED APR'. 15; 1919.

Patented Feb. 1?, L920.

3 SHEETS-SHEET 3.

w w W J j z W Z UNITED STATES PATENT onnron.

DAVID COCKBURN AND DONALD MACNICOLL, OF CARDO NALD, NEAR GLASGOW, SCOTLAND, ASSIGNOBS TO JOHN LL'GYD TAYLOR AND ALBERT EDWARD TAYLOR, BOTH 0F LIVERPOOL, ENGLAN D.

ENGINE AND Lrxn sovnanon.

Specification of Letters Patent.

Patented Feb. 1'7, 1920.

Application filed April 15, 1919. Serial No. 290,341.

To all whom it may concern:

Be it known that we, DAVID COGKBURN and DONALD MACNICOLL, subjects 01": the

tained, the valve in question being the ordinary throttle valve, or a special emergency valve and gear.

According to th1s invention, between the governor and a Valve controlled or operated thereby, and the steam or motive fluid controlling valve, controllingthe supply of the fluid to the engine, there is employed a fluid pressure motion system through which a fluid under pressure is either excluded from, or admitted to the system between the governor control valve, and the pressure fluid main controlling valve, so that the pressure when supplied to the system, through suit able .mechanism, operates upon excessive speed or the engine, to close the supply of pressure, to reduce the speed of the engine, that isthe system is normally closed when the speed of the engine and" governor is not o excessive, and kept closed (say by a spring),

whereas whenthe speed is excessive it is opened, and so admits'fluid under pressure froma suitable source to the fluidpressure system, between the governor controlled or actuated valve, and the main engine motor fluid controlling valve.

In the accompanying drawings, this system is illustrated, and severalmodifications of forms of governor control, and mechanisms controlled by it are given, and the in vention willbe further described in connection with these drawings.

Figure lot-the drawings illustrates diagrammatically the system, and Fig. 2 shows in detail a construction. of governor and valve actuated or controlled by it.

Fig. 3 shows a modified arrangement of the governor controlled or actuated valve shown in Fig. 2.

Referring in the first instance to Fig. 1, 1 generally designates the governor; 2 a lever or arm operated by it; 3 the valvular device operated by the lever or arm; a the pipes of the fluid pressure system; and 5 the valvular controlling apparatus actuated or controlled by the governor.

In this system upon the governor attaining an excessive speed, the valvular apparatus 8 is operated, and the valve proper in it is opened so as to admit pressure fluid existing in the pipe 6, (which is connected with the source of fluid pressure supply) to act upon the fluid in the pipes 4, and this pressure is conducted to a cylinder and piston, or other equivalent mechanism 7, which 7 it operates; and operating upon a lever 8,

through a relay say of any known suitable kind, actuates and closes the main engine steam or motor fluid supply pipe or conduit, andso stops the engine.

In the case shown, this lever 8 of the valvular relay apparatus is also adapted to be operatedbyhand through the lever 9 working over a quadrant 10, and the short arm of which is connected by a connection 11 with the lever 8.

Referring now to the governor construction shown in Fig. 2, the governor which acts upon the lever 2 comprises a stationary casing or cylinder 15, and a rotary part 16 revolved by the engine, having within it a body 17 mounted and adapted to slide radially in the cylindrical body 16 in a sleeve 18 therein; the body 17 being normally pulled inward in the rotatable carrier'16 by a spring 19, connected to it at one end, and at the other end fixed to the bottom 20 of the sleeve 18. V

The inner portion of the lever 2 normally lies close to the rotary body 16; and when an excessive speed of the governor takes place, the body 17 moves readily out of the sleeve 18, and strikes on the inner edge of the lever 2 (which is pivoted to the case 15) and moves it.

The valve actuated .by the governor or lever 2 is marked 21, and it controls an opening in the wall 22 between the pressure supply conduit 6, and the conduit 4; and

in the upper fpart 1 the; casing ofthe valve 21, towhi'chthe ipee isConiiec'ted, is" a non-return valve 23, which normally rests upon its' eat inthe"case,-'-but is lifted when the fluid .p'ressureisadmitted to it by the pressing of the valve 21 oil its seat.

The stem 24 of the valve 21 at its upper end, slides in a sleeve 25, which'isnormally' pressed down by a spring 26, held at its upperend-fin .the casing 27v;-and at its lower end rests on a ring on the, lower part of the sleeve 25, so that the spring 'urge's'the sleeve 25flin the direction of; the opening of the valve 2111} if V Theinnei' lower end of the sleeve25-is adapted; to! act on the shoulder formed on the valve stenif24fjust'"beneath it; and also inrconnectioii;with a seating 28 in the casing27,s t1mt lwhenk-thel plunger is moved.

down,' and the valve opened (the plunger restin'glon the seating 28,; which ,is provided with'a jointing material), the escape. of

pressure fluid along the' valve stem 24, and the1'1'e1,from;t11e valve casing 2' 7, is prefventedn. Y 7

Within the sleeve 25 there is a ,second SpringBQ, whichis heldzat its lowerond byan 'internal I fiange on the sleeve, and at its other end acts Yon a "shoulder formed by the, enlarged ;-head 31 of the'valve' I stem 24, so 'that' this valve stem' is always pressed upwardby this spring, and thevalve 21 on to; its seat iand vthe spring 1 6 tively 'sniall and weak to the spring 26, and it: isQnnder ,but'slight, initial stress; and it moves along withthe valve stem 24, which follows ,themovement of the sleeve 25 when moved by the Stronger'spring 26.

The valve '21. is normally? held upon] its seat 'by the short upper end ofthe lever 2. and a lever, pivoted at 1' 34 to the enlarged head 31 of 'thevalve stem 24, the short arm of33,. resti1 1g..0l1 the outer end of the ca"- ing 27, and this arm 33 is held in this posi; tion, and so holds the spring '30 under com-v pressionfor potential by means of theinner,

catchf edge oridetent 3 5,;which engages the metalofthe, outer end of a slot formed in' ating apparatusor device 7, thereby closing the stea or motor fluid supply valve, and

stepsitheeng ne 1T0 "reopen he 'ma na op .oron olling valve,the parts have to be re-set by hand,

and the arrn33 moved so as to ,be'z'engaged by the "catch 35'of"theleve1"2.

In the modification shown in Fig. 3, the lever'2 which is actuated by the governor similarly as above. described, is 'held' in the position to which i'tis moved temporarily,

so that the apparatus is peated-actuations. it

In thls case, the lever 2 prevented from reis connected di- -rectlyto a aw by a pin joint on the 'endof.

the valve spindle 24, on the end of which the valve 21 is 'fixedyan'd which is moved off its seat 22 when the lever 2 is actuated by;

the protrusiongofithe bolt or movingdevice of the governor. If Thus, as in the other as rangement,' when the valve is opeii fluid-f under. pressure such as water, steam, com? pressed air or the like is. allowed to pass to the underside of the valve 23 which controlsthe steampr inotor fiui d'suonlysrelay system'; and in order] to maintain the r leverflin the positionfin which the valve'is opened so that 1tw1ll be clearoflthef protruded de vice of the. governormarkedf1'? 1n Fig.

there is fitted on the valve spindle124"a piston24? which adaptedto engage with a collar 37 011 the valve spindle,fthe under side of the piston 24 being open to the ,at'- mosphere by way or the port 38; while fluid under pressure has access to the topllof the piston24 byway of'aport 39leadingtrom' the valve stem guide to the undersideof the valve 23;

By this piston" acting on the collar;37 of the spindle, it tends to press" the" spindle! andval've' in a directionwhich will maintain the lever2 n the posit onin 'whlch -ltS lowerj arm is clear of the protrudingjbo lt ofthe'governor. A

In the'bracket 41 of the casing li jof the governor, thereis spring bolt 'Inarked 42,

shown injdot'ted lines, andjin the upper endf of the arm2 Isa recessorhole 43, into which thespring pressed Bl-7, 1 moves Whenthe re cess or hole'43. is overjit, so thatlthe 'leverf 2 is detained against return movement after being operated Joy" the governQrQwhileat-l the same time it has a pertain amount of freedom due to thehole oraperturej43-be ingsuch a size that thefspring pressed bolt will have a certain am'ount'ofplay in the recess;

To reset, the valvular device, the spring pressed pin'42 will be disengaged fr'om'the aperture 43; and the lever 2 moved'to its normal position; this being efiected'by the spring 30;; and the valve 21 is brought back onto its seat a ain, V

'VVh'at' is claimed is 1. Inhappar atns of the character "dehaving a stem, a cylinder secured to the cas ing and hav'inga port leading into the valve casing, a piston arranged upon the" valve stem and slidable in thecylinder, aspring scrlbed, a valve casing, a valve in the casing.

to move the valve stem in one direction, and centrifugal means to move, the valve stem in an opposite direction.

2. In apparatus of the character described, a valve casing, a valve in the casing having a stem, a cylinder arranged near the valve casing and having a port leading into the valve casing rearwardly of the valve, a piston mounted to slide in the cylinder and carried by the stem, and means to move the stem including a centrifugal governor.

3. In apparatus of the character described, a valve casing, a valve in the casing having a stem extending diagonally within the casing, a cylinder arranged diagonally of the casing and secured thereto and having a port Which leads into the valve casing, said cylinder having the valve stem extending through and outwardly beyond the same, a piston carried by the valve stem and slidable Within the cylinder, an element connected With the outer end of the valve stem, and a centrifugal governor to actuate the element.

4. In an engine motor fluid controlling system, a valve adapted to be opened by a connection actuated by the governor, a motor fluid controlling valve connected with the governor operated valve, and a pressure service system connected with said valve, and means for temporarily retaining the governor actuated lever in the position in which it will not be repeatedly acted upon by the governor and is retained after it has been actuated.

5. In an engine motor fluid controlling system, a valve adapted to be opened by a connection actuated by the governor, a motor fluid controlling valve connected With the governor operated valve, a pressure service system connected With said valve, means for temporarily retaining the governor actuated lever in the position in which it will not be repeatedly acted upon by the governor, and a piston on the valve spindle adapted to be acted upon by pressure fluid when the valve is opened by fluid from the main service conduit, and to normally tend in a direction to maintain the valve in the open position.

In testimony whereof We have signed our names to this specification in the presence of two subscribing Witnesses.

DAVID COCKBURN. DONALD MAcNICOLL. Witnesses HENRY MAsoN, THOMAS BISHOP GRAHAM. 

